| Summary: | Alpha blending is broken on win32 surfaces | ||
|---|---|---|---|
| Product: | cairo | Reporter: | Szuromi Gábor <kukkerman> |
| Component: | win32 backend | Assignee: | cairo-bugs mailing list <cairo-bugs> |
| Status: | RESOLVED FIXED | QA Contact: | cairo-bugs mailing list <cairo-bugs> |
| Severity: | normal | ||
| Priority: | medium | ||
| Version: | 1.10.3 | ||
| Hardware: | x86 (IA32) | ||
| OS: | Windows (All) | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: | Buggy alpha blending under win32 demo | ||
So I completely fluffed the fallback damage tracking for win32. How much further do we get with? commit 9bb5b02694e1bbd5c0cdd28606d80fb2d2d701ee Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Wed Mar 21 20:08:15 2012 +0000 win32: Fix damage flushing The damage wasn't being created on the right surface, so the damage to the fallback image surface was not being tracked. Perform a little bit of juggling so that we track dirty regions on the fallback surface itself. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> commit c504dba5a76def6358a5b309ad5bc4a8dfe6199e Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Wed Mar 21 20:07:00 2012 +0000 damage: Fix memcpy size Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> |
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Created attachment 58775 [details] Buggy alpha blending under win32 demo Alpha blending on win32 surfaces is broken since commit ae3319890eacd1c8282ca6df7b263ac74abb5f8d, only fully opaque pixels (alpha = 1.0) are actually apperaing in the window. See the attached source and play with the global alpha variable. The first affected version is 1.11.2 (according to git describe).